989667 has 24 divisors (see below), whose sum is σ = 1707264. Its totient is φ = 540144.

The previous prime is 989663. The next prime is 989671. The reversal of 989667 is 766989.

It is an interprime number because it is at equal distance from previous prime (989663) and next prime (989671).

It is not a de Polignac number, because 989667 - 2² = 989663 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1108 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (71136).

2⁹⁸⁹⁶⁶⁷ is an apocalyptic number.

989667 is a deficient number, since it is larger than the sum of its proper divisors (717597).

989667 is a wasteful number, since it uses less digits than its factorization.

989667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 716 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 989667 is about 994.8200842363. The cubic root of 989667 is about 99.6543734659.

It can be divided in two parts, 9 and 89667, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 989667 in words is "nine hundred eighty-nine thousand, six hundred sixty-seven".